Untitled

<!DOCTYPE html>
<html>
<head>
<title>1</title>
<script>
var VGender=0;
    function Validate(){
        if(!document.getElementById('username').value){
        alert("Please Enter UserName!");return;}
        if(!document.getElementById('password').value){
        alert("Please Enter password!");return;}
        if(!document.getElementById('age').value){
        alert("Please Enter age!");return;}
        if(!VGender){
        alert("Please Choose Gender!");return;}
        if(!document.getElementById('Email').value){
        alert("Please Enter Email!");return;}
        if(document.getElementById('password').value.length<6){
            alert("Password Length Is Minimum 6 Characters");return;
        }
        if(isNaN(document.getElementById('age').value)){
            alert("Please Enter Valid Age!(only Numbers Allowed)");
            return;
        }
        if(!document.getElementById('Email').value.includes('@')){
            alert("Please Enter A Valid Email Adress! (Atleast 1 @)");return;
        }
        if(!document.getElementById('Email').value.includes('.')){
            alert("Please Enter A Valid Email Adress! (Atleast 1 '.' )");return;
        }
        if(document.getElementById('Email').value.indexOf('@')>document.getElementById('Email').value.indexOf('.')){
            alert("No . Allowed Before @!");return;
        }
    }
</script>
<style>
body{
background-color:grey;
}

</style>
</head>
<body><font color=white>

    <form id=form1>
        Username: <input type="text" id="username"><br>
        Password: <input type="password" id="password"><br>
        Age : <input type="text" id="age"><br>
        Gender: <input type=radio id=GenderM name=G onclick="VGender=1"> Male <input type=radio id=GenderF name=G onclick="VGender=1"> Female <br>
        Email: <input type=text id=Email >
        <br>
        <input type=button value=Submit name=Submit id=Submit onclick="Validate()">
        <input type=reset  value=Reset name=Reset id=Reset>

    </form>
</body>
</html>